Atomizing and spraying device



E. 1. McLEAN AND s. w. McGAVRAN,

ATOMIZING AND SPR'AYING DEVICE.

APPLICATION FILED AUG. I3, I919.

Patented Nov. 1, 1921;

'3 SHEETSSHEET 1- 10 4 ism! 1 i l .5!

E. J. McLEAN AND s w. McGAVRAN,

ATOMIZING AND SPRAYING DEVICE.

4 APPLICATION FILED AUG. I3, 1919. 1,395,965,

Patented. Nov. 1, 1921.,

3 SHEETS- SHE ET 2.

E. J. McLEAN AND s. w. McGAVRAN.

ATOMIZING AND SPRAYING DEVICE.

APPLICATION FILED AUG. 13, 1919.

Patented Nov. 1, 192

3 SH EETSSHEET 3.

.merous other analogous UNITED STATES' PATENT OFFICE.

EDWARD J. McLnANfor SAN" FRANCISCO, AND STEPHEN w. McGAVRAN, or BUR-LINGnMn, CALIFORNIA.

ATOMIZING AND SPRAYING DEVICE.

- To all whom it may concern:

Be it known that we, EDWARD J. MCLEAN, a citizen of the United States,residin in the city and county of San Francisco, tate of California, andSTEPHEN W. MoGAvRAN, a citizen of theUnited' States, residing at.Burlingame, county of San Mateo, State of California, have invented anew and useful Atomizing and Spraying Device, of which the following isa specification.

Our invention relates to a novel construction ofv an atomizing andspraying device, whereby liquids, such as paints, washes or chemicalscan be sprayed upon any desired 'point, our device being especiallyapplicable for painting ships bottoms, or large, rough constructions ofall kinds, white-washing,

horticultural spraying, disinfecting and nuurposes, where economy oflabor and material, together with great efliciency and speed arerequired.

Our invention is based on the known tend ency of all liquids tobe brokenup into minute particles or atomized, when coming into conjunction orcollision with a column of compressed air or gas moving in a givendirection: our novel device being especially adapted to be readilyconnected up with the standard compressed air supply, commonly installedin modern, large industrial plants, where compressed air mains andconnections are always available, standard hose connections beingemployed and our novel device being portable, and being capable of beingreadily moved 'or transported from one position to another. Ourinvention further consists of a novel construction of a coverfor a tankcontaining the liquid to be sprayed, said.

cover being provided with tapped, holes adapted to receive the air inletand liquid discharge pipes and to supportthe pipe connections thereonand to also receive a valve adapted to support a funnel or similarfilling device. Our invention further consists in conjunction with thecover aforesaid, of a novel construction ofpiping including valvularandtubu'lar connections, whereby 'upon the proper manipulation ofcertain of the valves, the device is capable-of being used as a blowerfor compressed air alone, for, the

purpose of blowing off the dust, dirt and the like from the structure tobe painted or sprayed, prior to the painting or spray ng operation, thesame arrangement of piping upon the proper manipulation of the proper vSpecification of Letters Patent.

For the purpose of llustrating our invention, we have shown in theaccompanying drawings one form thereof which is at present preferred byus, since the same will be found in practice to give satisfactory andreliableresults, although it is to be understood that the variousinstrumentalities of which our invention consists can be variouslyarranged and organized and that our invention is not limited to theprecise arrangement and organization of these instrumentalities asherein shown and described.

Figure 1 represents aside elevation of an atomizing and spraying device,embodying our invention.

Fig. 2 represents a plan view of Fig. 1. Fig. 3 represents a perspectiveview of a portion' of the discharge nozzle seen in Fig. l. I

Fig. 4 represents a vertical section on line 44 Fig. 1. 4

of the tank, certain of the parts being shownin section.

Fig. 6 represents a top plan view of the cover seen in F ig. 2, with thepiping'removed therefrom.

Fig. 7 represents a top plan view of the supporting ring attached to thetop of the atomizer tank.

Patented NOV. 1, 1921. a Application filed August 13,1919. Serial No.317,134. I

Fig. 5 represents a side elevation of the Fig. 8 represents averticalsectional view of the manually operated controlling valve employed.

Fig. 9 represents a section on line 9-'-9 Fig. 8.

Fig. 10 represents a perspective view of the device seen in Fig. 1showing particularly the arrangement of the valves and piping, forenabling the device'to be used as a compressed air blower or atomizer orsprayer at will. i

Similar numerals of reference indicate corresponding parts in thefigures.

Referring to the drawings 1 designates our novel atomizing and sprayingdevice, the same comprising a tank 2 of sufficient strength to withstandthe desired pressure, said tank having a ring 3, which may be of castiron, riveted, welded or otherwise secured to the top thereof. The ring3 is provided with lugs'4 having the slots 5 therein, which aline withsimilar lugs and slots 6 and 7 respectively of the cover 8, which ispreferably of cast iron,'and is secured to said ring by means of thebolts 9, having wing nuts therein, a suitable gasket 10, beinginterposed between said cover and ring. The cover 8 has in the topthereof the central boss 11, the upper portion of which is threaded at12 to receive the threaded end of the pipe 13, while the bottom of saidboss is threaded at 14 to receive the upper threaded end of the pipe 15,through whose lower end 16, the compressed air is discharged inproximity to the bottom of the tank 2, said compressed air beingconveyed to the pipes 13 and 15, through the compressed air hose 16,check valve 17 and cross valve 18, it being obvious that when the latteris open the compressed air will flow through the hose 16, check valve 17valve 18, and pipe 13 into the pipe 15, thereby agitating and chargingthe liquid 19 contained in the tank and forcing it thence through theoutlet pipe 20, whose upper end is in threaded engagement with thebottom of the hole 21, through the boss 22, and the nipple 23, valve 24,pipe 25, and valve 26, to the outlet hose 27 which is connected to thepipe 28, having the discharge nozzle 29, the fiow of the atomized liquidthrough saidnozzle being controlled by the manually operated valve 30,Whose construction will be evident from Figs. 8 and 9. I

31 designates the valve casing and 32 a bracket supported thereon, thelower portion of said bracket being slipped over the threaded end 33 ofthe valvecasing, and the upper end of said bracket being slotted at 34,to form the ears 35. 36 designates the valve actuating lever which ispivoted at 37 in the ears 35, the inner end of said lever being inpivotal engagement at 38 with the valve stem 39, whose lower endterminates in the valve 40, which is manually pressed against its seat41.by the spring 42, the foregoing forming a ready and convenientmanually operated device for controlling or throttling the flow of theatomized liquid through the nozzle 29.

In order to conduct the compressed air from the valve 18 directly intothe pipe 25,

.- I employ the by-pass pipe 43, best seen in Figs. 2 and 10. which hasthe valve 44 therein. 45 designates a boss on the cover 8 having atapped hole 46, therein, for the reception of the threaded end 47, ofthe valve 48, which has a removable closure or lug 49, so that when saidplug is removed, t e lower threaded end 50, of the funnel 51 can beinserted as seen in Fig. 5, when it is desired to fill the atomizer.

The pins 52 which pass through the lugs 4 and serve to pivotally supportthe. bolts 9, may also be utilized to support the handles 53, as will beunderstood .from Figs. 1 and 10, whereby the tank can be readilytransported to any desired point. The operation is as follows The tank2, is filled with the desiredliquid by removing the plug 49 after whichthe funnel 51 is placed in position as seen in Fig. 5, and the Valve 48being opened the tank is filled to the desired extent. The funnel isthen removed and the valve 48 closed. Upon opening the valve 18 andadmitting compressed air through the hose 16, said air will flowthroughthe check valve 17, and pipes 13 and 15 to the bottom of the tank 2, andthe liquid 19 therein will be forced through the pipes 20, 23, valve 24,pipe 25, and valve 26 to the outlet pipes 27 and 28 and through thenozzle 29 in the form of a spray upon the desired point. The opening ofthe valve 44, will permit a portion of the compressed airto enter thefluid exit pipe 25 through the T 54 as will be understood from Figs. 2and 10.

By pressing on the valve lever 36, seen in Figs. 1, 8 and 9, the valve40, which normally is closed by the spring 42 may be manually opened tothe desired extent, and thus the discharge of the spray or atomizedliquid through the nozzle 29 may be throttled or controlled to thedesired extent.

When it is desired to use our novel device as a blower, it is onlynecessary to close the valve 24, and open the valves 18, 44 and 26,whereupon the. compressed air ,will flow through the valves 18, and 44,pipe 43, and valve 26 to the outlet pipes 27 and 28 and the nozzle 29 tothe desired point, the flow of compressed air to said nozzle 29 beingcontrolled by the valve 30 in the manner already described.

It is frequently desirable in the painting operation to first remove orblow oil the dust or dirt from the article to be'painted, and our deviceaffords a ready and convenient means for doing this, by simply theproper manipulation of the valves above described. The manually operatedthrottle valve 30, can be readily applied to the terminal pipe section28, and by reason of its construction and the manner of mounting thelever 36,

said exit pipe 20, nipple 23, and pipes 25, 27 and 28, it being evidentthat the valve 44 being open, that compressed air is permitted to flowthrough the by-pass 43 so as to come in contact with the liquid at thepoint 54 where theby-pass pipe 43 joins the outlet pipe 25, saidcompressed air coming in contact with the liquid at the point 54carrying said liquid in an atomized and suspended condition to the exitnozzle 29, where it is discharged upon the desired point in the form ofa spray or fog.

We are aware of the patent to Dunn, No. 1,199,734, patented September26th, 1916, wherein is disclosed a process of painting, wherein thepaint exit pipe terminates in the upper portion of the paint receptacleat a distance above the body of the paint, so that the air and paint aredischarged from the paint receptacle at a point above the level of thepaint against the surface to be painted. Our invention is differentiatedfrom the aforesaid construction by reason of the fact that our paintexit pipe 20 is extended nearly to the bottom of our tank 2, so that thepaint is not discharged from the level of the body of the paint, but thesame is taken from a point near the bottom of the tank, the atomizingbeing effected by the current of compressed air passing through theby-pass valve 44 in the by-pass 43 and meeting the liquid at the point54, so that our construction and process of atomizing the liquid orsemi-liquid treated or discharged is entirely dissimilarfrom the processof the Dunn patent aforesaid, and to none of the constructions of theprior art do we herein make .our claim.

In painting different surfaces, it is desirable and necessary that fluidin varying degrees of atomization be used, and also that varying degreesof velocityv ofthe ejected atomized fluid be employed, and to that end,

the structure of applicants invention has been devised. It is obviousthat by adjusting the valve 44 in the by-pass, to varying positions, theatomized condition of the fluid ejected from the tank 2 may be varied.It is further obvious that by adjusting the cross-valve 18, the pressurein tank 2 may be varied at will. Either valve 18 or valve 44 may beadjusted individually, Without affecting in any manner, the function ofthe air inlet pipe discharging in other; or if desired, both valves maybe adjusted without affecting, in any way, the function of each valveindividually.

It will now be apparent that We have devised a novel and usefulconstruction of an atomizing and spraying device, which embodies thefeatures of advantage enumerated as desirable in the statement of theinvention and the above description, and while We have, in the presentinstance, shown and described a preferred embodiment thereof which willgive in practice satisfactory nd reliable results, it is to beunderstood that the same is susceptible of modification in variousparticulars without departing from the spirit or scope of the inventionor sacrificing any of its advantage. Y

Having 'thus described our invention, what we claim as new and desire tosecure by Letters Patent, is

1. In a device of the character stated, a paint-containing tank having acompressed air inlet pipe discharging in proximity to its bottom, an airand paint discharge pipe having its inlet end in proximity to thedischarge end of the compressed air inlet pipe and having its outlet endadapted for connection with a discharge hose, a valve controlled bypassbetween said pipes, and a removable cover for said tank, said pipes andby-pass being mounted on and supported by said cover.

2. In a device of the character stated, a paint-containing tank having acompressed roximity to its bottom, a manually operab e valve controllingsaid pipe, an air and paint discharge pipe having its inlet end inproximity to the bottomof said tank, and having its outlet end adaptedfor connection with a discharge hose, a valve controlled by-pass betweensaid pipes, said by-pass communicating with said air inlet pipe at apoint in advance of said controlling valve, and a cover for said tank,said pipes and by-pass being mounted on and supported by said cover. I

EDWARD J. MoLEAN. STEPHEN W. McGAVRAN.

Witnesses:

H. H. HITZER', ROY.OLSEN.

